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Lee, S-W, Chen J-C, Wu J-A, Chen K-H.  2017.  Synthesis and Properties of Poly(ether sulfone)s with Clustered Sulfonic Groups for PEMFC Applications under Various Relative Humidity, 2017. ACS Applied Materials & InterfacesACS Applied Materials & Interfaces. 9(11):9805-9814.: American Chemical Society AbstractWebsite
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Lee, C-P, Chen W-F, Billo T, Lin Y-G, Fu F-Y, Samireddi S, Lee C-H, Hwang J-S, Chen K-H, Chen L-C.  2016.  Beaded stream-like CoSe2 nanoneedle array for efficient hydrogen evolution electrocatalysis, 2016. Journal of Materials Chemistry A. 4(12):4553-4561.: The Royal Society of Chemistry AbstractWebsite

The development of earth-abundant and efficient electrocatalysts for the hydrogen evolution reaction (HER) is one of the keys to success for future green energy systems using hydrogen fuel. Nanostructuring of electrocatalysts is a promising way to enhance their electrocatalytic performance in the HER. In this study, pure pyrite-type beaded stream-like cobalt diselenide (CoSe2) nanoneedles are directly formed on flexible titanium foils through treating a cobalt oxide (Co3O4) nanoneedle array template with selenium vapor. The beaded stream-like CoSe2 nanoneedle electrode can drive the HER at a current density of 20 mA cm−2 with a small overpotential of 125 mV. Moreover, the beaded stream-like CoSe2 nanoneedle electrode remains stable in an acidic electrolyte for 3000 cycles and continuously splits water over a period of 18 hours. The enhanced electrochemical activity is facilitated by the unique three-dimensional hierarchical structure, the highly accessible surface active sites, the improved charge transfer kinetics and the highly attractive force between water and the surface of the nanoneedles that exceeds the surface tension of water.

Lee, YY, Tu KH, Yu CC, Li SS, Hwang JY, Lin CC, Chen KH, Chen LC, Chen HL, Chen CW.  2011.  Top laminated graphene electrode in a semitransparent polymer solar cell by simultaneous thermal annealing/releasing method. ACS Nano. 5:6564-6570.
Lehmann, G, Hess* P, Wu J-J, Wu CT, Chen KH, Chen LC, Lee H-Y.  2001.  Structure and elastic properties of amorphous SiCN films. Phys. Rev.. B64:165305-(1-10).
Li, CL, Huang BR, Chattopadhyay* S, Chen KH, Chen LC.  2004.  Amorphous boron carbon nitride as a pH sensor. Appl. Phys. Lett.. 84:2676-2678.
Li, CC, Lin RJ, Lin HP, Chang CC, Lin YK, Chen LC, Chen KH.  2011.  Catalytic performance of plate-type Cu/Fe nanocomposites on ZnO nanorods for oxidative steam reforming of methanol. Chem. Comm.. 47:1473-1475.
Li, CC, Chen YW, Lin RJ, Chang CC, Chen KH, H.P.Lin, Chen LC.  2011.  Self-reductive mesoporous CuOx/Fe/silicate nanocomposite as a highly active and stable catalyst for methanol reforming. Chem. Comm.. 47:9414-9416.
Li, L-C, Huang K-H, Wei J-A, Suen Y-W, Liu T-W, Chen C-C, Chen L-C, Chen K-H.  2011.  Low-frequency contact noise of GaN nanowire device detected by cross-spectrum technique. J. J. App. Phys.. 50:06GF21.
Liang, CK, Chang ST, Verkhoturov SV, Chen LC, Chen KH, Schweikert* EA.  2014.  SIMS methodology for probing the fate and dispersion of catalytically active molecules. Intl. J. Mass Spectrometry . 370:107-113.
Liang, CH, Chen* LC, Hwang JS, Chen KH, Hung YT, Chen YF.  2002.  Selective-area growth of InN nanowires on gold-patterned Si(100) substrates. Appl. Phys. Lett.. 81:22-24.
Lien, H-T, Chang S-T, Chen P-T, Wong DP, Chang Y-C, Lu Y-R, Dong C-L, Wang C-H, Chen K-H, Chen L-C.  2020.  Probing the active site in single-atom oxygen reduction catalysts via operando X-ray and electrochemical spectroscopy, 2020. 11(1):4233. AbstractWebsite

Nonnoble metal catalysts are low-cost alternatives to Pt for the oxygen reduction reactions (ORRs), which have been studied for various applications in electrocatalytic systems. Among them, transition metal complexes, characterized by a redox-active single-metal-atom with biomimetic ligands, such as pyrolyzed cobalt–nitrogen–carbon (Co–Nx/C), have attracted considerable attention. Therefore, we reported the ORR mechanism of pyrolyzed Vitamin B12 using operando X-ray absorption spectroscopy coupled with electrochemical impedance spectroscopy, which enables operando monitoring of the oxygen binding site on the metal center. Our results revealed the preferential adsorption of oxygen at the Co2+ center, with end-on coordination forming a Co2+-oxo species. Furthermore, the charge transfer mechanism between the catalyst and reactant enables further Co–O species formation. These experimental findings, corroborated with first-principle calculations, provide insight into metal active-site geometry and structural evolution during ORR, which could be used for developing material design strategies for high-performance electrocatalysts for fuel cell applications.

Lien, HT, Wong DP, Tsao NH, Huang CI, Su C, Chen KH, Chen LC.  2014.  Effect of copper oxide oxidation state on the polymer-based solar cell buffer layers. ACS Appl. Mater. & Inter. .
Lien, H-T, Chang Y-C, Huang C-Y, Hsu H-C, Chang S-T, Wong DP, Wang C-H, Wang C-H, Chen K-H, Chen L-C.  2021.  Solar to hydrocarbon production using metal-free water-soluble bulk heterojunction of conducting polymer nanoparticle and graphene oxide, 2021. The Journal of Chemical PhysicsThe Journal of Chemical Physics. 154(16):164707.: American Institute of Physics AbstractWebsite
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Lim, W, Wright JS, Gila BP, Pearton SJ, Ren F, Lai WT, Chen LC, Hu MS, Chen KH.  2008.  Selective-hydrogen sensing at room temperature with Pt-coated InN nanobelts. Appl. Phys. Lett.. 93:202109-(1-3).
Lin, YG, Hsu YK, Wang SB, Chen YC, Chen LC, Chen KH.  2012.  Plasmonic Ag@Ag3PO4 Nanoparticle Photosensitized ZnO Nanorod-Array Photoanodes for Water Oxidation. Energy & Environ. Sci.. 5:8917-8922.
Lin, YR, Chou TC, Liu LK, Chen LC, Chen KH.  2016.  A facile and green synthesis of copper zinc tin sulfide materials for thin film photovoltaics. Thin Solid Films.
Lin, YG, Hsu YK, Chen SY, Chen LC, Chen* KH.  2010.  O2 plasma-activated CuO-ZnO inverse opals as high-performance methanol microreformer. J. Mater. Chem.. 20:10611-10614.
Lin, DY, Li CF, Huang YS, Jong YC, Chen YF, Chen LC, Chen CK, Chen KH, Bhusari DM.  1997.  Temperature dependence of direct band gap of Si-containing carbon nitride crystalline films. Phys. Rev. B. 56:6498-6501.
Lin, HY, Chen YC, Lin CY, Tong YP, Hwa LG, Chen KH, Chen* LC.  2002.  Field emission of nanostructured amorphous SiCN films deposited by reactive magnetron sputtering of SiC in CH4/N2atmosphere. Thin Solid Films. 416:85-91.
Lin, YG, Hsu YK, Chen YC, Chen SY, Chen LC, Chen KH.  2012.  Visible-light-driven photocatalytic carbon-doped porous ZnO nanoarchitectures for solar water-splitting. Nanoscale. 4:6515-6519.
Lin, CH, Chen RS, Chen TT, Chen HY, Chen* YF, Chen KH, Chen LC.  2008.  High photocurrent gain in SnO2 nanowires. Appl. Phys. Lett.. 93:112115.
Lin, Y-K, Chen R-S, Chou T-chin, Lee Y-H, Chen Y-F, Chen K-H, Chen L-C.  2016.  Thickness-Dependent Binding Energy Shift in Few-Layer MoS2 Grown by Chemical Vapor Deposition, 2016. ACS Applied Materials & InterfacesACS Applied Materials & Interfaces. 8(34):22637-22646.: American Chemical Society AbstractWebsite
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Lin, CH, Tseng SC, Liu YK, Tai Y, Chattopadhyay S, Lin CF, Lee JH, Hwang JS, Chen* LC, Chen WC, Chen* KH.  2008.  Suppressing series resistance in organic solar cells by oxygen plasma treatment. Appl. Phys. Lett.. 92:233302.
Lin, JC, Chen KH, Chang HC, Tsai CS, Lin CE, Wang JK.  1996.  The vibrational dephasing and relaxation of CH and CD stretches on diamond surfaces: An anomaly. J. Chem. Phys.. 105:3975-3983.
Lin, YG, Hsu YK, Lin YK, Chen SY, Chen LC, Chen* KH.  2011.  Microwave-activated CuO nanotip/ZnO nanorod nanoarchitectures embedded in a microreactor for efficient hydrogen production. J. Mater. Chem.. 21:324-326.